vdevd/helpers/LINUX/VBoxCreateUSBNode.sh
#!/bin/dash
# $Id: VBoxCreateUSBNode.sh $ */
## @file
# VirtualBox USB Proxy Service, Linux Specialization.
# udev helper for creating and removing device nodes for VirtualBox USB devices
#

#
# Copyright (C) 2010-2011 Oracle Corporation
#
# This file is part of VirtualBox Open Source Edition (OSE), as
# available from http://www.virtualbox.org. This file is free software;
# you can redistribute it and/or modify it under the terms of the GNU
# General Public License (GPL) as published by the Free Software
# Foundation, in version 2 as it comes in the "COPYING" file of the
# VirtualBox OSE distribution. VirtualBox OSE is distributed in the
# hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
#

umask 022

# Constant, from the USB specifications
usb_class_hub=09

action=$VDEV_ACTION
do_remove=0

if [ "$action" = "remove" ]; then 
   do_remove=1;
else
   do_remove=0;
fi

bus=`expr "$2" '/' 128 + 1`
device=`expr "$2" '%' 128 + 1`
class="$3"
group="$4"
devdir="`printf "$VDEV_MOUNTPOINT/vboxusb/%.3d" $bus`"
reldevpath="`printf "vboxusb/%.3d/%.3d" $bus $device`"
devpath="$VDEV_MOUNTPOINT/$reldevpath"

if [ -z "$devdir" ] || [ -z "$reldevpath" ]; then 
   exit 0
fi

case "$do_remove" in
  0)
  if test -n "$class" -a "$class" -eq "$usb_class_hub"
  then
      exit 0
  fi
  case "$group" in "") group="vboxusers";; esac
  mkdir -p $VDEV_MOUNTPOINT/vboxusb -m 0750 2>/dev/null
  chown root:$group $VDEV_MOUNTPOINT/vboxusb 2>/dev/null
  mkdir -p "$devdir" -m 0750 2>/dev/null
  chown root:$group "$devdir" 2>/dev/null
  mknod "$devpath" c $1 $2 -m 0660 2>/dev/null
  chown root:$group "$devpath" 2>/dev/null

  # add metadata directory for this extra device node,
  # so we can correctly clean up on coldplug device removal.
  mkdir -p "$VDEV_GLOBAL_METADATA/dev/$reldevpath"
  echo "$VDEV_INSTANCE" > "$VDEV_GLOBAL_METADATA/dev/$reldevpath/vdev_instance"
  touch "$VDEV_GLOBAL_METADATA/dev/$reldevpath/links"

  ;;
  1)
  rm -f "$devpath"
  ;;
esac

